1.   Benjamin said giving away free Net access is not a sustainable business model.

2.   But where is the sustainable business model?

3.   Companies are still trying to find the right balance of prices and service for a sustainable ISP business.

4.   He said the key is not whether an incubator is for-profit or nonprofit but whether it is based on a sustainable business model and offers the necessary services.

5.   If the bill became law, it would be difficult for competitors to build a sustainable business delivering high-speed Internet service to consumers over telephone networks.

6.   In addition, the program is creating sustainable businesses and tax revenues.

7.   Rumblings about whether e-commerce companies really had sustainable business models had started to crescendo.

8.   Sustainable business models are harder to come by.